1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml"><head>
3 <meta http-equiv="Content-Type" content="text/html; charset=gbk">
4 <title>累加按钮，自加1</title>
5 <style type="text/css">
6 body{text-align:center;}
7 input{font:12px arial;cursor:pointer;padding:0 10px;}
8 </style>
9 </head>
10 <body>
11 <input value="2" type="button">
12 <script type="text/javascript">
13 window.onload = function(){
14 var input = document.getElementsByTagName("input")[0];
15 input.onclick = function(){
16 this.value = ++this.value;
17 };
18 };
19 </script>
20 </body>
21 </html>
